Copper 10000 to 8519 -- 8148
Gold ---- to 8513 -- 8560
Zinc ---- to 8390 -- 7693
7458
Silver ---- to 7778 -- 7895
Stone calcareous hard ---- to 7304 -- 6963
Gres ---- to 6552 -- 6517
Glass ---- to 5862 -- 5506
Lead ---- to 5718 -- 6643
Zinc ---- to 5658 -- 6000
Clay ---- to 5185 -- 5185
Bismuth ---- to 4949 -- 6060
Antimony ---- to 4540 -- 5827
Oker ---- to 4259 -- 3827
Chalk ---- to 3684 -- 4105
Gypsum ---- to 2368 -- 2947
Wood ---- to 1552 -- 3146